@Ashley By using A-Frame. Construct would be great for Web-based VR, because you already have javascript and HTML based interaction design, which is what A-Frame is. I would highly suggest you consider figuring out how to make that work, even if it is only a cheat that provides a 2D representation of what the 3D environment would be. Just the ability to to use your Construct environment to build interactions without having to manually create the A-Frame components would be worth the price of admission.